Spain made their debut in the women's U-20 World Cup with an impressive 4-1 victory over Paraguay.
She put Spain ahead 1-0 in the 40th minute and Claudia Pina doubled the advantage early in the second half.
Jessica Martinez clawed one back for Paraguay in the 62nd minute, but Guijarro made it 3-1 for Spain two minutes later and completed the triple in stoppage time.
Japan got a goal from Hayashi in the 76th minute to defeat the United States 1-0 in the other Group C match.
In Group D, Germany and Nigeria - the 2010 and 2014 finalists - faced off at Stade Marville in Saint-Malo.
The first half ended scoreless, but the tempo increased after the break and Germany took the lead in the 69th on a goal by Stefanie Sanders, who exploited a rebound after the initial header off a corner hit the cross-bar.
Nigeria had a chance to equalize three minutes later with a free kick from the edge of the box, but Peace Efih's effort bounced off the post.
The other Group D game pitted China against Haiti.
China jumped out to a 2-0 lead on goals by Zhao Yujie and Shen Mengyu. While Haitian captain Nerilia Mondesir made it a contest when she converted a penalty in the 78th minute, the Caribbean side failed to get a second goal.
--IANS
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